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Anonymous users2024-02-06Analysis: Vitamin C, also known as ascorbic acid, is a water-soluble vitamin. English Name:
Vitamin C ,ascorbic acid Nature Molecular Formula: C6H8O6; Molecular weight:; CAS Number:
50-81-7；Acidic, oxidative decomposition in solution. Physical Properties Appearance: Colorless crystal; Melting Point:
190 - 192℃；Boiling Point: (None); Ultraviolet absorption maximum: 245nm; Fluorescence spectroscopy:
Citrus fruits, vegetables, etc.
Guidance: The main physiological function of vitamin C is 1, to promote the biosynthesis of bone collagen. It is conducive to faster healing of tissue wounds; 2. Promote the metabolism of tyrosine and tryptophan in amino acids and prolong the life of the body.
3. Improve the utilization of iron, calcium and folic acid. 4. Improve the metabolism of fats and lipids, especially cholesterol, and prevent cardiovascular diseases. 5. Promote the growth of teeth and bones and prevent gum bleeding.
6. Enhance the body's ability to resist stress and immunity to the external environment.
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Anonymous users2024-02-05Vitamin A (vitamina), also known as retinol (its aldehyde derivative retinaldehyde) is an unsaturated monool with ester rings, and vitamin A includes vitamin A 1 and A2. Vitamins A1 and A2 are structurally similar).
Retinol can be synthesized from plant**-carotene, which can be converted into two molecules of retinaldehyde (ratinal) under the catalysis of -carotene-15,15-dioxygenase (dioxygenase) in the body, and retinaldehyde is reduced to retinol under the action of retinaldehyde reductase. Therefore -carotene is also known as provitamin A.
Vitamin A1 molecular formula: C20H30O
Vitamin A2 molecular formula: C20H28O
CAS number 68-26-8
EINECS No. 200-683-7
Molecular weight inchiinchi = 1 c20h30o c1-16 (8-6-9-17 (2) 13-15-21) 11-12-19-18 (3) 10-7-14-20 (19, 4) 5 h6, 8-9, 11-13, 21h, 7, 10, 14-15h2, 1-5h3 b9-6+, 12-11+, 16-8+, 17-13+
Melting point 62-64
Boiling point 137-138
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Anonymous users2024-02-04Vitamin A is divided into vitamin A1 and vitamin A2, and the physiological functions of the two are similar, and vitamin A1 is mainly present in animals.
Version of the liver, blood and the retina of the eyeball, also known as retinol, melting point 64, vitamin A2 is mainly present in freshwater fish, melting point only 17 19.
Various animals are rich in vitamin A such as liver, fish eggs, whole milk and poultry eggs. Generally, plant-based foods do not contain vitamin A, but dark green vegetables such as spinach, rape, and sherry mushroom contain more vitamin A (carotene).
Adequate intake of vitamin C does have a helpful effect on beauty, and vitamin C can help whitening by blocking melanin production. >>>More
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It is useful, especially for people who often surf the Internet, to supplement vitamin AD, because the radiation of the computer will damage the vitamins in the body, and there are people with heart disease and stomach disease, these 3 kinds of people should often supplement vitamin AD
Of course not. Acne on the face is due to internal heat in the body, give you a Chinese medicine prescription: raw land 30g, danpi 9, red peony 9, coptis 10, skullcap 10, mulberry leaf 15, cicada clothes 10 (head and feet), angelica sinensis 10, prunella vulgaris 10, fried curcuma triangular 10 decoction. >>>More
I know very well that a lot of people ask the same question, and I recommend everyone to see how vitamin E is being sold online. >>>More